a conditional statement that is formed by switching and negating th hypothesis and the conclusion.

contrapositive

if a=b and b=c, then a=c; ____________ property.

complementary

part of a line that consists of an initial point and all points to one side of thgat point.

iff

points that lie on the same line. (two points)

acuteangle

angle that measures from 91 degrees to 179 degrees. (two words)

conjecture

a line that intersects two or more coplaner lines at different points.

noncoplanerpoints

if two lines are coplaner and do not intersect, then they are _____________.

deductivereasoning

a logical statements with two parts. (two words)

theorems

consists of two different rays that have the same initial point.

rightangle

part of a line that conists of two endpoints and all of the points in between.

skew

an unproven statement that is based om observations.

biconditionalstatement

using facts, definitions, and accepted properties in a logical order to write a logical argument. (two words)

oppositerays

if two lines intersect to form a right angle, then they are ___________.

angle

two collinear rays that have the same initial point, but extend in opposite directions. (two words)

transversal

the "if" part of a conditional statement.

undefined

abbreviation for "if and only if".

conclusion

two angles that share a common vertex, a common side, and no common interior points. (two words)

transitive

lines that do not intersect and are not coplaner are __________.

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